The television series I Didn't Know I Was Pregnant[2] shared the stories of women who had experienced medically cryptic pregnancies.
Nearly all the featured stories involved women who had intermittent bleeding throughout pregnancy that they misinterpreted as menstruation, while some cited not having regular periods due to polycystic ovarian syndrome (PCOS), or other conditions that are associated with infertility.
The women involved often did not gain weight or experience other major symptoms of pregnancy, such as morning sickness or breast sensitivity.
However, obstetricians on the show explained that, depending on the position of the placenta, the sensations of a baby moving can be minimal.
In 2015, the show's spin off, I Still Didn't Know I Was Pregnant, featured women who had experienced multiple medically cryptic pregnancies.